Actually visual aids can come in very handy for a Dresden game or campaign. I'm in a campaign set in the nearby city of New Haven, CT and because it's nearby, a number of the more interesting sites in and around the city have been photographed. This is useful as it can help the GM describe what it is the players see, since the GM can look at some of the pictures, other times the players a just shown some of the photographs.
If you live close enough to where your game is taking place, then having pictures of some of the more unique 'real' locations can help, unless it is already some place where you and/or the players are intimately familiar with.
Having props can also help some times, as does having things like wet erase roll out mats, or dry erase white boards.
Also depending on the number of people involved and how regularly the games are run, then having a campaign site can also help since pictures and information can be uploaded to the site. Our campaign is hosted on
www.epicwords.com, but the site used is really a matter of preference and for just three people (GM and 2 players) might not make much difference, or you might just use a cloud computing shared drive to share campaign information. I actually do both.
-Cheers
